Tag Archives: green

Hay rack dado doo dah day

Dado blade to the rescue

Well, if you remember yesterday, my screws weren’t long enough to attach the 7.5 inches of insulation and strapping to the roof. Alas.

Overnight I figured the only way out of this mess was to rip some dados in the polyiso and put my strapping into the dados. Thereby recovering the depth I needed to get my screws to grab.

Dado blade to the rescue.
Dado blade to the rescue.

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Hay rack consternation

Every job needs a Whaaa?

No it doesn’t. But, this is mine. See the great big sheets of insulation on the roof. They’re 3″s deep. Oh wait, no they are not. They’re 3.3. So times 2 layers, plus 3/4″ for the strapping … now attach with 8″ screws less 3/8″ for the screw head and special saw/auger bit tip …

Add a bit of angle … the screws don’t make it into the wood deep enough to hold a roof down in the wind. Ahhhhhhhhhhhh.

I was making excellent progress and feeling quite jolly when ... dang it.
I was making excellent progress and feeling quite jolly when … dang it.

I’ze in trouble.

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LiFeP04 vs Flooded Lead Acid batteries

Post from Simon, Karrak Farms, Australia

Creeky says: I thought this was interesting, so I bring this to the attention of those who are interested in LFP batteries for offgrid power storage.

LFP compared to FLA
LiFePO4  Flooded Lead Acid
Total Operating Voltage Range 14.4 – 11.2 15.5 – 10.5
Normal Operating Voltage Range, No Load 13.8 – 12.8 (90%-20%SOC) 15.5 – 12.0 (100%-50%SOC)
Normal Operating Voltage Range, C/8 Load 13.8 – 12.4 15.5 – 11.0
Normal Operating Voltage Range, C/2 Load 13.8 – 12.0 15.5 – 10.5
Max sustained charge rate 1C C/8
Recommended sustained charge rate N/A C/10
Sustained discharge rate 1C C/8
Peukert Coefficient ~1.02 1.2-1.6
Current efficiency >95% <90%
Lifespan ~10 years ~6 years
Warranty 5 year prorata (balqon) 5 year prorata (trojan)
Cost per kWh ~US$340 ~US$130
Cost per usable kWh ($/kWh/cycledepth) ~US$523 ~US$325
Cost per usable kWh per year ~US$52.30 ~US$54.20

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Hay Rack — insulation in progression

Let the cladding begin

I’ve finally managed to get my hay rack sheathed and the insulation process has begun.

Two boards up. From the back corner to the door, layer one.
Two boards up. From the back corner to the door, layer one.

This shows the “perfect wall” ala creeky. You can see the wood sheathing, then the control layer, then the polyiso insulation. This will receive two layers. Layer one is shown here. The second layer will be attached to the structure with wooden strapping which will hold the metal and shou-sugi-ban cedar siding. Next year.

More pics and info after the break

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Hay rack — the 100 mile tiny house

Hi, the hay rack / chalet / winter bedroom build has over twenty posts -- see "the hay rack" category for, yup, 3 pages of Hay Rack goodness! From the bare frame to the fabulous finish ... it's all there. Thx for visiting.
Sheathed

Pretty much sheathed. A few tricky spots left to cut in, but let the insulation begin… just in time for lots of rain, but I need a rest day.

You can see here I’m using 1×12 pine milled locally by my Amish friends in Black Lake, NY. Sustainable local lumber.

I've placed the door frame in its opening to check everything is kopacetic (okay).
I’ve placed the door frame in its opening to check everything is kopacetic (okay).

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